The new leader of the Soviet Union in the 1950s, Nikita Khrushchev, undertook what action (and when) that had a profound impact on the relationship between the Chinese Communist Party and the Soviet Union? a.Invaded Hungary, 1956 fall b.Launched world's 1st artificial satellite, Aug 1957 c.Supported Fidel Castro in Cuba, late 1959-1961 d.De-Stalinized Soviet Union, 1956 Spring e.Furthered relations with the USA by visiting America, 1959